TEMPO-Functionalized Nanoporous Au Nanocomposite for the Electrochemical Detection of H₂O₂

Figure 3

(a) Different modified GCE in 0.1 M PBS (pH = 7.0) under N₂. Scan rate: 50mVs. (A) Bare GCE, (B) np-AuNPs/GCE, (C) MA-np-AuNPs/GCE, and (D and inset) TEMPO-np-AuNPs/GCE. CVs of np-AuNPs (b) and TEMPO-np-AuNPs (c) on the GC electrode surface under N₂, 0.1 M PBS (pH = 7.0) at different scan rates from 10mVs to 200mVs. Inset: (b) the linear relationship between the scan rate and the currents at a potential of 0.55V. (c) The linear relationship between anodic (black spots, at 0.95 V) and cathodic (red spots, at 0.38 V) peak currents and scan rate. (d) CVs of different electrodes in 0.5 M H₂SO₄ under N₂, 0.1 M PBS (pH = 7.0) at a scan rate of 100 mVs.(A) np-AuNPs, (B) MA-np-AuNPs, and (C) TEMPO-np-AuNPs.

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